Crane for attachment to tractors



Feb. 27, 1951 J. H. WALKER ETAL 2,543,391

CRANE FOR ATTACHMENT TO TRACTORS Filed March 9, 1948 I N V EN TOR.J'omv. hf Wm mm 4 BY CLHKENCE WCAEMSI/IW 6 6 t 4 may iZTOP/VE! PatentedFeb. 27, 1951 FQFICE CRANE FOR ATTACHMENT T TRACTORS John H. Walker andClarence W. Crenshaw, Beaumont, Tex.

Application March 9, 1948, Serial No. 13,903

(Cl. 2l2-14i) 1 1 (Claim.

The invention concerns a crane which is adapted to attached to a tractorand which is interchangeable with other tractor drawn tools andimplements.

In the construction of certain types of tractors it is common practiceto support tools and implements of rifierent kinds from the rear of thetractor at three difierentipoints. The tractor may be equipped with apair of rearwardly extending drawbare for example, which are pivotallymounted at their forward ends and the rear lard ends of which may beraised and lowered hydrau lically. The arrangement is such that therearward ends of the drawbars lie at all times in the s:-. e horizontalplane, and the usual practice is to piotally support the tool from therearward ends of the drawbars. The third point of support for the toolis usually above and between the rearwardly eXtending-drawbars, the toolbeing pivotally secured to the rearward end of a link which. p otallysecured at its forward end to frame of the tractor.

The device of .ie invention is adapted for use in connection with astructure of the type de scribed. More particularly the inventionconcerns a crane which is adapted to be supported from the rear of atractor in the manner described and which is interchangeable with othertractor drawn tools and implements.

It is an object of the invention to provide a t tor operated crane whichmay be actuated by the hydraulic lift mechanism of the tractor.

It is further object of the .vQlllliOIl to provide a tract ccessory oithe type described which may be di y attached to and removed. from a torand which is interchangeable with other -r drawn tools and implements.

It is also an c-biect of the invention to provide a tractor operatedcrane which is characterized by a high degree of versatility and whichaiiords a .imum of convenience to the operator.

Another object of the invention is to provide a tractor operated cranewhich is relatively simple in con truction and may be manufacturedinexpensively.

Another object of the invention is to provide a tracto operated cranewhich, although 1:; is of rela sturdy, rugged de- 11 and requires aminimum of g, in which: Fig. 1 1s a plan view of the device as viewedfrom the top thereof.

Fig. 2 is a side elevation taken on the line 22 of Fig. 1.

Referring to the drawing, the device of the invention includes a boomwhich is formed by a tubular member A and stiiiening means comprising areen'forcing rod it and gusset plates 3 and i. The gusset plates 3 and iare secured to one side or" the tubular member 5 and extend upwardlytherefrom, the gusset plate 3 being positioned adiacent one end of thetubular member i and the gusset plate. it being positioned intermediatethe ends of the tubular member i. The reeniorcing rod 2 is secured atone end to the tubular member i and at the other end to one side of thegusset plate 3, and is supported intermediate it ends by the gussetplate the gusset plate t being wider than the gusset plate Thereenforcing rod 2 is bent around the gusset plate i and is secured toone side thereof. 7

One end of the tubular member 5 is flattened and an opening is formedtherein, the arrangement being such that the end of the tubular member Imay be pivotally secured directly to the frame of a tractor, nointermediate linkage being required.

A triangular frame comprising an angle iron 6 and a pair of bars '5 isprovided for supporting an intermediate portion of the boom from therearward ends of the tractor drawbars. A pair of pins secured toopposite ends of the angle iron 6, the pins 8 being adapted to beinserted thru corresponding openings formed in the rearward ends of thetractor drawbars. The bars i are secured at one end to opposite ends ofthe angle iron 6, and at the other end to opposite sides of the gussetplate Openings ii are formed in the ends of the bars l, the ii beingadapted to receive a pin iii for attachment of the bars l to the gussetplate 4. A plurality of openings 5 i are formed in the gusset plate i,the openings i i likewise being adapted to receive the pin it. Theopenings H are spaced apart, and the arrangement is such that theelevation of the boom may be adjusted by selectively inserting the pinill thru one of the openings ii.

A hook i2 is secured to the upper end of the boom, the hook ii beingjoined to the tubular member 5, the reenforcing rod 2 and the gussetplate 3 and being adapted to support a block and tackle (not shown).

A hook it is suspended freely from an inter mediate portion of tubularmember between the gusset plates 3 and a loop being formed in the shankportion of the hook It for use in suspending it from the tubular memberI. The book l3 likewise is adapted to support a block and tackle (notshown). A plurality of lugs [4 extend upwardly from one side of thetubular member I. The lugs l4 are spaced apart and are adapted to act asstops to fix the position of the hook [3 with respect to the tubularmember l The arrangement is such that upon lifting the hook I3 the loopin the shank portion thereof will clear the lugs 14, and the position ofthe hook I3 with respect to the tubular member I may be adjusted bysliding the hook is along the tubular member I and selectively placingit immediately above one of the lugs 14.

A clevis I5 is secured at its ends to an intermediate portion of theangle iron 6 and may be used as a draft connection or for securelyanchoring objects which may be supported from the hooks l2 and I3.

The invention may be modified in various ways without departing from thespirit and scope thereof.

We claim:

A crane includin a tubular member adapted to be pivotally secured at oneend to the frame of a tractor, a reenforcing rod secured at its ends tothe tubular member and supported intermediate its ends by a gusset platepositioned between the tubular member and the reenforcing rod, ahorizontal member adapted to engage the rearward ends of a pair oftractor drawbars, a pair of upwardly extending members adapted toconmeet the ends of the horizontal member to the gusset plate, openingsbeing formed in the ends of the upwardly extending members andcorresponding openings being formed in the gusset plate, the openingsbein adapted to receive a pin to secure the upwardly extending membersto the gusset plate, the openings in the gusset plate being spaced apartand the arrangement being such that the elevation of the crane may beadjusted by selectively inserting the pin thru the openings in the endsof the upwardly extending member and one of the openings in the gussetplate.

JOHN H. WALKER.

CLARENCE W. CRENSHAW.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 83,195 Middleton Oct. 20, 18681,558,636 Rutan Oct. 2'7, 1925 1,729,539 Davis Sept. 24, 1929 1,852,003Cummings Apr. 5, 1932 1,873,433 Larsen Aug. 23, 1932 2,113,879Delalandre Apr. 12, 1938 2,433,019 Arps Dec. 23, 1947 2,470,857 Lathel'sMay 24, 1949 2,505,639 Eaton Apr. 25, 1950

